John  e



(No Model.)

H. C. SCHRADER,

MOLD MOISTENBR.

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PAT-ENT FFICE. f

JOHN E. sCHLIEPER, or' Pirrssuna, PENNSYLVANIA, AssIGNOR To THE sTIRLING COMPANY, or CHICAGO, ILLINOIS.

SrEAM-IBOILER.

SPECIFICATION forming part ofIetters Patent No. 526,947, dated October A2, 18,94.

- Application iiled June 28, 1894. Serial No. 516,010. (No model.) I'

vertical section taken through the 'fire box` from front to rear of my improved boiler.

In constructing my improved boiler, I provide a fuel chamber, A, of any desired form and size, preferably covering it with an arch, a, which also acts to deflect the heated gases and products of combustion into the furnace chamber, orboiler proper, for the purpose of ralsing the temperature and generating steam therein.

Arranged inthe upper part of the boiler are two large steam and water drums, B B', which have steam communication by means of the pipe, b, and water communication through a secondary water drum, C, by means of the pipes, c 'cv-these connecting pipes belng direct or circuitous as desired. The seco ndary water drum, which may be of any deslred size,is preferablyplaced at a lower level than the main steam and water drums, so as to reduce thegwater level ltherein and thus prevent priming or foaming. It also provides additional heating surface and aids in regulating the circulation. Y

Arranged in the lower part of the boiler are two mud drums, D D, having water communication with each other by means of the pipe, d, which may be direct or circuitous as desired. The rear elevated steam and water drum, B, is connected with the lower mud drum, D, by means of abank of tubes, E, and the front elevated steam and water drum, B', is connected with the vfront lower mud drum, D', by means of a bank of tubes, E', while the secondary elevated water drum is connected with one of the lower mud drums, preferably the middle one, by means of a series of tubes, e.

The feed water is introduced through an elevated feed water drum, G, which is connected with a rear lower mud drum, G', by

means of a bank of tubes, g, so that water may pass from the elevated feed drum into the rear lower mud drum. This rear mud drum has communication with the forward mud drum or ydrums by means of a tube or series of tubes, g', this communication being direct or circuitous as desired.v The elevated feed water drum also has steam communication with the forward elevated steam and water drums, by means of a tube or tubes, g2, which furnish an outlet for steam generated therein and in the rear bank of tubes. 4Water is supplied to the elevated feed water drum, from any suitable source of water supply, by means of a supply pipe, H, which may be provided with a disk, h, inside the drum, for the purpose of separating the water and conducting it to the sides of the drum.

The front bank of tubes may be provided with abaftle plate, I, for the purpose of guiding the heated gasesand products of combustion up through the tubes,`until it contacts both the elevated water and steam drums andv the secondary water drum. This front baflie plate may have an extended portion, i, to direct the heated gases around the tubes eX- tending down from the secondary drum as they pass to the second bank of tubes, behind whichis arranged another deflecting plate, K,

vwhich extends down almost to the lower mud so as to .deiect or guide the heated drum, gases or products of combustion down through such bank of tubes until they contact the lower mud drums, after which they may pass up through the rear bank of tubes, and out through the chimney or stack, L. A

In operation, the water enters the upper feed drum and passes down into the rear mud drum, being slightly warmed or heated in its passage, so that a portion of its sediment may be precipitated before it passes into general circulation. The water then passes on into the forward mud drum or drums, up into the elevated drums, across from one drum to an other, down again to the mud drums, and so on continuously-allowance being of course made for evaporation. During this general circulation, the secondary drum, being so arranged that a large part of the water passes through it, performs the functions above stated-reduces the water level, aids in regu- IOO box O can be raised or lowered within the movable part of the mold in any suitable outer boxA. This inner box may be weighted `way and its other end attached to some fixed in anysuitable manner to make ittheproper part,as to the side wall of t e extensionas eight. shown, the spring being provided with one or 6o 5 E is the mold which may be of any premore coils 7c as shown.

ferred form of construction and it is sup- Instead of the lever H being of the form ported upon the platform or Support E which shown in Fig. l and in Fig. 3 in full lines, it

is arranged Within the extension and is renmay be as shown by dotted lines in Fig. 3

dered vertically adjustable by means of the wherein itis shown asa vertical lever pivotally 65 zo screw rod F to whose lower end it is attached, mounted at its lower end and its upper end the said rod being passed throughl the tube turned horizontally to form a foot pedal by depending from the bracket G secured which it may be operated. Itis suitablyconwithin the extension, and upon the screw rod nected with the movable part of the mold by above this bracket is an `adjustingnut g as a crank arm or other connection H3 as shown 7o 15 shown best in Fig. 3. so that the movement of the lever will close by the lever H which is connected thereto as` zo at h in Figa` `n 3, said-1e e n d` thnloo` 

